CN111911531B - Return type elastic supporting structure and engine - Google Patents
Return type elastic supporting structure and engine Download PDFInfo
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- CN111911531B CN111911531B CN202010742346.4A CN202010742346A CN111911531B CN 111911531 B CN111911531 B CN 111911531B CN 202010742346 A CN202010742346 A CN 202010742346A CN 111911531 B CN111911531 B CN 111911531B
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- ring
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- elastic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
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Abstract
The invention discloses a folding type elastic supporting structure and an engine, which are used for elastic supporting of a rotor, and comprise: a first ring encircling the rotor main shaft and bearing against the bearing of the rotor main shaft; the second ring is arranged around the first ring in a coaxial way; a bending part for connecting the first ring and the second ring; the first ring, the bending part and the second ring are integrally formed and form an axial section of
A shaped base structure. According to the folding-back type elastic supporting structure, through the design of the first ring and the second ring, on the premise that the supporting rigidity is met in a limited axial space, the rigidity of the supporting structure is correspondingly reduced through the design of the folding-back type elastic supporting structure. Meanwhile, the excessive deformation of the folding elastic supporting structure can be limited, and the reliability of the structure is ensured. The mechanical elastic support has the advantages of controllable rigidity, simple structure, low manufacturing cost, wide application range, long service life and good reliability, and is suitable for being used as a mechanical elastic support of a rotor.
Description
Technical Field
The invention relates to the field of elastic support, in particular to a folding type elastic support structure. The invention also relates to an engine comprising the folding elastic supporting structure.
Background
The working rotating speed of modern aeroengines is generally more than 10000r/min, the working rotating speed of some small engines is up to 50000r/min, and high-speed rotor systems of the aeroengines are designed by adopting a flexible shaft, so that the working rotating speed of the engines is higher than the critical rotating speed of the rotor systems. It is often difficult to adjust the critical speed by changing the rotor structure shaft (diameter, fulcrum distance, etc.). Currently, there are two main types of elastic support structures: cage bar type elastic support and elastic ring type support. The cage-bar type elastic support usually requires a large axial space, and under the condition that the axial space is limited, the cage-bar type elastic support is difficult to realize on the structural layout. The elastic ring type elastic support occupies a small space, but the inner boss and the outer boss are required to be processed on one thin ring, so that the processing difficulty is high, and the thin ring is difficult to ensure not to deform under the condition of ensuring the processing precision.
Disclosure of Invention
The invention provides a foldback elastic support structure and an engine, and aims to solve the technical problem that an existing elastic ring type elastic support is easy to deform in a limited space.
The technical scheme adopted by the invention is as follows:
a reentrant elastic support structure for elastic support of a rotor, comprising: a first ring encircling the rotor main shaft and bearing against the bearing of the rotor main shaft; the second ring is arranged around the first ring in a coaxial way; a bending part for connecting the first ring and the second ring; the first ring, the bending part and the second ring are integrally formed and form an axial section of
A shaped base structure.
Further, the foldback elastic supporting structure also comprises a limiter for limiting the elastic swing amplitude of the foldback elastic supporting structure and preventing the first ring from colliding with the second ring during the working process.
Furthermore, the amplitude limiter is arranged at one end, far away from the bending part, of the outer wall surface of the first ring; and/or the amplitude limiter is arranged at one end, far away from the bending part, of the inner wall surface of the second ring.
Further, the calculation formula of the rigidity of the folding elastic supporting structure is as follows:
in the formula, k1Is the stiffness of the first loop, k2The stiffness of the second loop.
Further, the stiffness of the first loop is calculated by the formula:
wherein E is the elastic modulus of the material selected for the folding elastic supporting structure, I1Is a section inertia parameter of the first ring, R1Is the inner diameter of the first ring, L1The axial length h from one end of the first ring close to the bending part to the central line of the bearing1Is the thickness of the first collar.
Further, the stiffness of the second loop is calculated by the formula:
wherein E is the elastic modulus of the material selected for the folding elastic supporting structure, I2Is the section inertia parameter, R, of the second ring1Is the inner diameter of the first ring, L2Is the axial length of the second ring, h1Is the thickness of the first ring, h2Is the thickness of the second ring, c1Is the radial radius gap of the first ring and the second ring.
Further, the free end of the second ring is provided with a mounting edge for connecting with the casing.
Furthermore, the mounting edge is fixedly connected with the casing through a connecting piece.
Further, the first ring is made of an elastic metal material; the second ring is made of elastic metal material.
According to another aspect of the present invention, there is also provided an engine including the above-described fold-back elastic support structure.
The invention has the following beneficial effects:
the invention relates to a fold-back type elastic supporting structure, which comprises a first ring, a bending part and a second ring, wherein the first ring, the bending part and the second ring are integrally formed and form an axial section
A shaped base structure. Through the design of the first ring and the second ring, the rigidity of the supporting structure can be correspondingly reduced through the design of the folding elastic supporting structure in the limited axial space on the premise of meeting the supporting rigidity. Meanwhile, the excessive deformation of the folding elastic supporting structure can be limited,the reliability of the structure is greatly guaranteed. Moreover, the rigidity of the folding elastic supporting structure is controllable, the structure is simple, the manufacturing cost is low, the application range is wide, the service life is long, the reliability is good, and the folding elastic supporting structure is suitable for being used as a mechanical elastic support of the rotor. Not only can provide wide-range supporting rigidity, but also has stronger damping and vibration-reducing effects, and integrates the functions of elastic supporting and vibration reducing. The return type elastic supporting structure can be used for supporting aeroengines, ground gas turbines and other rotary mechanical rotors, and can realize the elastic design of the support in a smaller axial space so as to meet the requirement on the support rigidity in the rotor dynamic design.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is an axial sectional view of a folding elastic support structure according to a preferred embodiment of the present invention.
The reference numbers illustrate:
1. a first loop; 2. a second loop; 3. a bending part.
R1The inner diameter of the first ring 1; l is1The axial length from one end of the first ring 1 close to the bending part to the central line of the bearing; h is1The thickness of the first ring 1; l is2The axial length of the second ring 2; h is2The thickness of the second ring 2; c. C1The radial radius clearance of the first ring 1 and the second ring 2.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is an axial sectional view of a folding elastic support structure according to a preferred embodiment of the present invention.
As shown in fig. 1, the folding elastic support structure of the present embodiment, which is used for elastic support of a rotor, includes: a first ring 1 surrounding the rotor main shaft and supported on a bearing of the rotor main shaft; a second ring 2 which surrounds the first ring 1 and is arranged coaxially with the first ring 1; a bending part 3 for connecting the first ring 1 and the second ring 2; the first ring 1, the bending part 3 and the second ring 2 are integrally formed and have an axial section of
A shaped base structure. The invention relates to a fold-back type elastic supporting structure, which comprises a first ring 1, a bending part 3 and a second ring 2, wherein the first ring 1, the bending part 3 and the second ring 2 are integrally formed and form an axial section
A shaped base structure. Through the design of the first ring 1 and the second ring 2, the rigidity of the supporting structure can be correspondingly reduced through the design of the folding elastic supporting structure in the limited axial space on the premise of meeting the supporting rigidity. Meanwhile, the excessive deformation of the folding elastic supporting structure can be limited, and the reliability of the structure is greatly ensured. Moreover, the rigidity of the folding elastic supporting structure is controllable, the structure is simple, the manufacturing cost is low, the application range is wide, the service life is long, the reliability is good, and the folding elastic supporting structure is suitable for being used as a mechanical elastic support of the rotor. Not only can provide wide-range supporting rigidity, but also has stronger damping and vibration-reducing effects, and integrates the functions of elastic supporting and vibration reducing. The return type elastic supporting structure can be used for supporting aeroengines, ground gas turbines and other rotary mechanical rotors, and can realize the elastic design of the support in a smaller axial space so as to meet the requirement on the support rigidity in the rotor dynamic design.
In this embodiment, the foldback elastic support structure further includes a limiter for limiting the elastic swing amplitude of the foldback elastic support structure and preventing the first ring 1 and the second ring 2 from colliding during operation. The foldback elastic supporting structure further comprises an amplitude limiter, and the amplitude limiter is used for limiting the elastic swing of the foldback elastic supporting structure and preventing a gap between the first ring 1 and the second ring 2 from disappearing along with the increase of the vibration of a main shaft of the rotor during the working process of the foldback elastic supporting structure, so that the first ring 1 is in contact with the second ring 2. Therefore, the amplitude limiter can be arranged on the contact surface of the first ring 1 and the second ring 2, the swing amplitude of the first ring 1 and the second ring 2 is reduced or limited, and plastic deformation is avoided, namely the amplitude limiter 3, on one hand, the elastic swing of the turn-back type elastic supporting structure can be limited, on the other hand, the contact loss of the first ring 1 and the second ring 2 can be avoided, meanwhile, because the first ring 1 and the second ring 2 are combined together through the amplitude limiter, the vibration reduction of the rotor is realized through the damping effect of the amplitude limiter, the rigidity of the turn-back type elastic supporting structure is changed, the dynamic characteristic of the rotor is further changed, the rotor is separated from a large vibration state, and the effect of reducing the vibration of the rotor is also achieved. The folding elastic supporting structure realizes the elastic design of the support in a smaller axial space so as to meet the requirement on the supporting rigidity in the rotor dynamic design. For a traditional squirrel cage design, the squirrel cage elastic support requires a larger axial dimension under the same rigidity condition. The limiter is usually made of flexible materials with certain damping effect, such as rubber, graphite and the like, so that the phenomenon that the folding elastic support is seriously damaged or even damaged is avoided when the limiter plays a role in limiting.
Preferably, the limiter is arranged at an end of the outer wall surface of the first loop 1 away from the bending part 3. And/or the amplitude limiter is arranged at one end of the inner wall surface of the second ring 2 far away from the bending part 3. The amplitude limiter is arranged on the outer wall surface of the first ring 1 or the inner wall surface of the second ring 2 and the contact surface of the first ring 1 and the second ring 2, and is far away from one end of the bending part 3. One end of the first loop 1 is connected with the opposite end of the second loop 2 through the bending part 3, thereby distributing the applied force to the first loop 1 and the second loop 2 in a limited space, namely, the pressure intensity of the unit area of the folding elastic supporting structure is reduced on the folding elastic supporting structure which bears the same acting force and has larger dispersion area, thereby reducing the loss of the folding elastic supporting structure, and the design of the folding elastic supporting structure, so that the first ring 1 has a free end, where the free end is easy to swing, and the swing frequency is the largest, therefore, the limiter is designed at the end of the outer wall surface of the first ring 1 far from the bending part 3 or the end of the inner wall surface of the second ring 2 far from the bending part 3, namely, the free end close to the first ring 1, so that the first ring 1 and the second ring 2 are effectively prevented from colliding. The two sets of amplitude limiters can be designed and are respectively designed on the outer wall surface of the first ring 1 and the inner wall surface of the second ring 2, and the two sets of amplitude limiters are symmetrically arranged.
In this embodiment, the calculation formula of the stiffness of the folding elastic support structure is as follows:
in the formula, k1Is the stiffness, k, of the first loop 12The stiffness of the second ring 2.
According to the calculation formula of the rigidity of the folding elastic supporting structure, the integral rigidity of the folding elastic supporting structure can be adjusted by adjusting the rigidity of the first ring 1 and the rigidity of the second ring 2. The design of the foldback elastic supporting structure can firstly calculate the rigidity of the support required to be met, and the size of the foldback elastic supporting structure is designed, so that the matched foldback elastic supporting structure is designed in the same axial space, and the requirement on the rigidity of the support in the rotor dynamic design is met by adjusting the different sizes of the first ring 1 and the second ring 2.
In this embodiment, the calculation formula of the stiffness of the first ring 1 is:
wherein E is the elastic modulus of the material selected for the folding elastic supporting structure, I1Is a section inertia parameter, R, of the first ring 11Is the inner diameter of the first ring, L1The axial length h from one end of the first ring 1 close to the bending part to the central line of the bearing1Is the thickness of the first collar. The inner diameter is a radius.
In this embodiment, the calculation formula of the stiffness of the second ring 2 is:
wherein E is the elastic modulus of the material selected for the folding elastic supporting structure, I2Is a section inertia parameter, R, of the second ring 21Is the inner diameter, L, of the first ring 12Is the axial length of the second collar 2, h1Is the thickness of the first ring 1, h2Is the thickness of the second ring 2, c1Is the radial radius clearance of the first ring 1 and the second ring 2. R1+h1+c1The inner diameter of the second ring 2. The inner diameter is a radius.
The above equations for the stiffness of the first loop 1 and the second loop 2 are typically determined by adjusting the axial length L under the determined modulus of elasticity of the selected material1、L2Thickness h1、h2Radial clearance c between the first ring 1 and the second ring 21The adjustment of the rigidity is realized, and the free end of the second ring 2 is provided with a mounting edge for connecting with a casing, so that the axial length L of the second ring 22Limited, can be adjusted by L1、h1、h2、c1Adjustment of the stiffness of the folded-back elastic support structure can also be achieved.
In this embodiment, the free end of the second ring 2 is provided with a mounting edge for connection with a casing. Preferably, the mounting edge is fixedly connected with the casing through a connecting piece. The free end of the second ring 2 is provided with a mounting edge which is connected with the casing, the mounting edge can adopt a flange extending outwards along the radial direction of the second ring 2, and the mounting edge and the casing can be fixedly connected through a connecting piece. The connecting piece can adopt a bolt.
In this embodiment, the first ring 1 is made of an elastic metal material. The second ring 2 is made of an elastic metal material. The first ring 1 and the second ring 2 are made of elastic metal materials, so that certain elastic support is achieved, and deformation of the folding elastic support structure can be limited. Preferably, the elastic metal material is selected from aluminum alloy, high temperature alloy, etc., and the metal material is preferably selected because the elastic support needs to have good elastic performance and can bear the load transmitted by the rotor. The specific material type, material grade and the like can be selected according to specific needs. However, structural steel, stainless steel, or the like may be used.
According to another aspect of the present invention, there is also provided an engine including the above-described fold-back elastic support structure. The engine comprises the folding elastic supporting structure and is applied to a turboshaft engine, and a large number of bench tests and outfield use conditions show that a rotor supported by the folding elastic supporting structure can stably work in the engine for a long time.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A folding-back type elastic supporting structure for elastic supporting of a rotor is characterized in that,
the method comprises the following steps:
a first ring (1) surrounding the rotor spindle and bearing against the rotor spindle;
a second ring (2) surrounding the first ring (1) and arranged coaxially with the first ring (1);
a bent portion (3) for connecting the first loop (1) and the second loop (2);
the first ring (1), the bending part (3) and the second ring (2) are integrally formed and form an axial section of
A shaped base structure;
the calculation formula of the rigidity of the folding elastic supporting structure is as follows:
in the formula, k1Is the stiffness, k, of the first ring (1)2The stiffness of the second loop (2);
the stiffness k of the first ring (1)1The calculation formula of (2) is as follows:
wherein E is the elastic modulus of the material selected for the folding elastic supporting structure, I1Is a section inertia parameter, R, of the first ring (1)1Is the inner diameter, L, of the first ring (1)1The axial length h from one end of the first ring (1) close to the bending part (3) to the central line of the bearing1Is the thickness of the first ring (1);
the rigidity k of the second ring (2)2The calculation formula of (2) is as follows:
wherein E is the elastic modulus of the material selected for the folding elastic supporting structure, I2Is a section inertia parameter, R, of the second ring (2)1Is the inner diameter, L, of the first ring (1)2Is the axial length h of the second ring (2)1Is the thickness of the first ring (1), h2Is the thickness of the second ring (2), c1Is the radial gap between the first ring (1) and the second ring (2).
2. The foldback resilient support structure of claim 1,
the foldback elastic supporting structure further comprises a limiter used for limiting the elastic swing amplitude of the foldback elastic supporting structure and preventing the first ring (1) and the second ring (2) from colliding in the working process.
3. The foldback resilient support structure of claim 2,
the amplitude limiter is arranged at one end, far away from the bending part (3), of the outer wall surface of the first ring (1); and/or
The amplitude limiter is arranged at one end, far away from the bending part (3), of the inner wall surface of the second ring (2).
4. The foldback resilient support structure of claim 1,
the free end of the second ring (2) is provided with a mounting edge used for being connected with the casing.
5. A reentrant resilient support structure according to claim 4,
the mounting edge is fixedly connected with the casing through a connecting piece.
6. The foldback resilient support structure of claim 1,
the first ring (1) is made of an elastic metal material;
the second ring (2) is made of elastic metal material.
7. An engine comprising a reentrant resilient support structure according to any one of claims 1 to 6.
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| CN202010742346.4A CN111911531B (en) | 2020-07-29 | 2020-07-29 | Return type elastic supporting structure and engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010742346.4A CN111911531B (en) | 2020-07-29 | 2020-07-29 | Return type elastic supporting structure and engine |
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| CN111911531B true CN111911531B (en) | 2021-12-24 |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3961829A (en) * | 1972-09-20 | 1976-06-08 | Dunlop Limited | Improvements in or relating to resilient mountings |
| JP2007269212A (en) * | 2006-03-31 | 2007-10-18 | Nok Corp | Center bearing support |
| JP2013099995A (en) * | 2011-11-08 | 2013-05-23 | Nok Corp | Center bearing support |
| CN103307101A (en) * | 2013-05-08 | 2013-09-18 | 南京航空航天大学 | Mixed damper |
| CN203614601U (en) * | 2013-12-13 | 2014-05-28 | 中航商用航空发动机有限责任公司 | Combined type elastic supporting device |
| CN204267598U (en) * | 2014-11-28 | 2015-04-15 | 哈尔滨广瀚燃气轮机有限公司 | With the returning type elastic support of film damper |
| CN104797832A (en) * | 2012-11-22 | 2015-07-22 | 舍弗勒技术股份两合公司 | Elastically supported rolling bearing arrangement |
| CN206987898U (en) * | 2017-06-02 | 2018-02-09 | 中国航发湖南动力机械研究所 | A kind of elastic support |
| CN109736446A (en) * | 2019-01-03 | 2019-05-10 | 田丽 | A kind of variation rigidity vertical vibration isolation/shake support |
| CN110005545A (en) * | 2019-02-21 | 2019-07-12 | 西安航天动力研究所 | A kind of mouse cage elastically yielding bearing cavity configuration |
| CN110285972A (en) * | 2019-06-25 | 2019-09-27 | 西北工业大学 | A kind of aero-engine tester touches rub device and rub experiment method |
| CN110486100A (en) * | 2018-05-15 | 2019-11-22 | 通用电气公司 | Stiffness variable support housing |
-
2020
- 2020-07-29 CN CN202010742346.4A patent/CN111911531B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3961829A (en) * | 1972-09-20 | 1976-06-08 | Dunlop Limited | Improvements in or relating to resilient mountings |
| JP2007269212A (en) * | 2006-03-31 | 2007-10-18 | Nok Corp | Center bearing support |
| JP4775563B2 (en) * | 2006-03-31 | 2011-09-21 | Ｎｏｋ株式会社 | Center bearing support |
| JP2013099995A (en) * | 2011-11-08 | 2013-05-23 | Nok Corp | Center bearing support |
| CN104797832A (en) * | 2012-11-22 | 2015-07-22 | 舍弗勒技术股份两合公司 | Elastically supported rolling bearing arrangement |
| CN103307101A (en) * | 2013-05-08 | 2013-09-18 | 南京航空航天大学 | Mixed damper |
| CN203614601U (en) * | 2013-12-13 | 2014-05-28 | 中航商用航空发动机有限责任公司 | Combined type elastic supporting device |
| CN204267598U (en) * | 2014-11-28 | 2015-04-15 | 哈尔滨广瀚燃气轮机有限公司 | With the returning type elastic support of film damper |
| CN206987898U (en) * | 2017-06-02 | 2018-02-09 | 中国航发湖南动力机械研究所 | A kind of elastic support |
| CN110486100A (en) * | 2018-05-15 | 2019-11-22 | 通用电气公司 | Stiffness variable support housing |
| CN109736446A (en) * | 2019-01-03 | 2019-05-10 | 田丽 | A kind of variation rigidity vertical vibration isolation/shake support |
| CN110005545A (en) * | 2019-02-21 | 2019-07-12 | 西安航天动力研究所 | A kind of mouse cage elastically yielding bearing cavity configuration |
| CN110285972A (en) * | 2019-06-25 | 2019-09-27 | 西北工业大学 | A kind of aero-engine tester touches rub device and rub experiment method |
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